EP 0178519 B1 19900131 - PROCESS FOR THE PREPARATION OF DIALKOXY-TRIAZINYL-PYRENES
Title (en)
PROCESS FOR THE PREPARATION OF DIALKOXY-TRIAZINYL-PYRENES
Publication
Application
Priority
DE 3437663 A 19841013
Abstract (en)
[origin: US4675402A] The process for the preparation of 2,4-di-(C1-C4)-alkoxy-1,3,5-triazinyl-6-pyrenes by reacting 2,4-dichloro-1,3,5-triazinyl-6-pyrene with alkali metal (C1-C4)-alcoholates is carried out in a mixture of a lower alkanol and an aprotic, dipolar organic solvent. The product, which is of importance as an optical brightener, is obtained in an improved state of purity as a result of using this mixture of solvents, and higher degrees of whiteness are obtained thereby.
IPC 1-7
IPC 8 full level
C07D 251/20 (2006.01)
CPC (source: EP US)
C07D 251/20 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE GB LI
DOCDB simple family (publication)
EP 0178519 A2 19860423; EP 0178519 A3 19870812; EP 0178519 B1 19900131; DE 3437663 A1 19860417; DE 3575722 D1 19900308; JP S6197272 A 19860515; US 4675402 A 19870623
DOCDB simple family (application)
EP 85112353 A 19850930; DE 3437663 A 19841013; DE 3575722 T 19850930; JP 22499885 A 19851011; US 78342685 A 19851003